Valve



(No Model.)

J. L. COOK.- VALVE.

No. 574,881. Patented Jan. 12, 1897.

Witnesse lnventr,

JMES 22,5002@ UNITED STATES PATENT EEICE.

JAMES L. COOK, OF SPRINGFIELD, ILLINOIS.

VALVE.

SPECIFICATION forming' part of Letters Patent No. 574,881, dated January 12, 1897. Application iiled February '7, 1896.- Serial No. 578,415. (No model.)

To @ZZ whom it may concern:

Be it known that I, JAMES L COOK, a citizen of the United States, residing at Springfield, in the county of Sangamon and State of Illinois, have invented certain new and useful Improvements in Valves, of which the following is such a full, clear, and exact description as will enable those skilled in the art to which it appertains to make and use my said invention.

The purposes of my invention are to provide suitable means of novel and improved form adapted to prevent the escape of steam, air, or liquids, from the body of the valve around the valve-stem without the use of packing such as is ordinarily used in valves; to provide in the valve-bonnet ball-bearings adapted to facilitate the turning of the stem and reduce the friction between the bearingsurfaces; to providel simple and improved means whereby the disk within the valvebonnet maybe retained on its seat regardless of the pressure of steam or liquid wit-hin the valve; to provide simple and effective means whereby the disk may be connected with the valve-stem; to provide hardened surfacessuch as hardened-steel plates, for exampleon which the balls within the valve-bonnet press; to provide means connecting the screwcap with the valve-stem, so that the screwcap may turn with the stem, and in general to provide avalve having ball-bearings and having in the bonnet of the valve a disk which is always in place on its seat whether the valve is open or closed.

With these ends -in view my invention consists in certain novel features of construction and combinations of parts shown in the annexed drawings and hereinafter particularly described and specifically claimed.

In the drawings, to which reference is hereby made, Figure ll isa side elevation of the complete valve. Fig. 2 is a vertical longitudinal section on the axis of the valve. Fig. 3 is a detached perspective lview of the stem, a part of the disk-plate and the nut being shown as broken away so as to show the threaded part of the stem on which the nut screws. View of the ring tting on the valve-stem. Fig. 5 is an enlarged detached perspective view of one of the bearing-plates.

Fig. 4 is an enlarged perspective` Similar letters of reference designate lik parts in all of the views.

I have shown my improvements as applied 5 5 to a radiator-valve; but they may Obviously be applied to valves of other kinds without departing from the spirit of or sacrificing any of the advantages of my invention.

The valve-body A may be of any usual and 6o suitable form and need not be particularly described.

The valve -bonnet A has its lower end threaded and screws into the top of the valvebody, as clearly shown in the drawings. the lower part of thevalve-bonnet are internal and diametrically opposite channels ce.

The main valve B in the valve-bodyAhas integral arms I), the ends of which slide in the channels CL and serve to guide the move- 7o modating a disk D', which may be of Iiber, 8o

vulcanized rubber, composition metal, or any other suitable material. In practice the disk D may be entirely dispensed with and the ltop of the disk-plate d may be ground to lit on the valve-seat c in the valve-bonnet. The 8 5 lower end of the valve-stein is threaded, as at d', to fit in the stem of the valve B, as clearly shown in Fig. 2. The valve-stem has near its center a screw-threaded part d2, which receives a nut D2, which serves to retain the 9o disk D in place on the disk-plate. O'n the upper part of the'stem D is a screw-threaded part d3, on which the screw-cap E tits. The tightening of the screw-cap E presses the disk D lirmly on its seat a', so as to effectually 95 prevent leakage. The screw-cap E surrounds and incloses the upper end of the Valve-bonnet, so as to exclude dirt and grit lfrom the cavity in the upper part of the valve-bonnet in which the balls turn.

which-a lug f on the ring F fits, so that the ring turns with the stem and is prevented from turning independently of the stem,

The valve-bonnet has The stem D has in roo Yits upper part a longitudinal channel d4, in

thereby obviating loosening of the screw-cap when the stem is turned. The hand-wheel II iits on the upper squared end d5 of the valve-stem.

The bearing-plates G are preferably made of hardened steel, but other suitable material may be used. The bearing-plates inclose the valve-stem and tit loosely in the cavity in the upper part of the valve-bonnet above the diaphragm a2. Balls J, between the bearingplates G, surround the valve-stem and fill the cavity in the upper end of the valve-body. These balls serve to diminish the friction between the bearing-surfaces when the screwcap is screwed down and permit the stein to be readily turned and obviate undue wear of the surfaces in contact.

I prefer to use two bearing-plates G and a ring F, provided with a lug,A as shown in the drawings. It is obvious, however, that a thicker bearing-plate, having a lug fitting in the channel di, may be substituted for the ring F and the upper bearing-plate without departing` from my invention.

In assembling the parts the disk D is placed on the disk-plate and the nut D2 is screwed down to hold it in place. The lower bearing-plate is then placed in the cavity in the upper end of the valve bonnet. The valve-stem is then passed upward through the central hole in the diaphragm 0:2, so that the disk D' will bear squarely on the seat a. The balls J are then disposed around the valve-stem on top of the lower bearing-plate G. The upper bearing-plate is then placed on the stein above the balls. The ring F is next placed on the stem above the upper bearing plate. The screw cap F. is then screwed on the top of the ring F, and the hand-wheel H is then placed on the squared upper end of the valve-stem.

1t will be seen that by tightening the screwcap E the plates G will be held in contact with the balls J and the disk D will be caused to make a close connection with the valve-seat a.

By turning the hand-wheel II the stem G will be turned so as to raise or lower the valve B in an obvious manner.

It will also be seen that the turning of the valve-stem does not in any way affect the seating of the disk D', but the disk is always firmly seated whether the valve B is raised or lowered, the pressure of steam or liquid within the valve serving to additionally retain the disk in place on its seat. Increasing pressure of steam or liquid within the valve only causes the disk to rest more firmly on its seat, thereby effeetually preventing any leakage which might otherwise result from wear of the parts.

The screw-cap E screws firmly down on the ring F and turns with the valve-stem and is independent of the valve-bonnet, so as to obviate any displacement of the screw-cap by reason of engagement of the screw-cap with the periphery of the upper end of the valvebonnet.

I ain aware that balls have heretofore been used to reduce the friction between the bearing parts of valves. I therefore do not claim that feature broadly. I am also aware that a nut has been used on a valve-stem having an integral collar to keep said collar in contact with an annular ledge on the inside of the bonnet of a valve, but I am not aware of the use prior to my invention of a nut on the valve-stem surrounding and inclosing the upper end of the valve-bonnet, so as to exclude dirt from the cavity of the valve bonnet. Neither am I aware of the prior use of a detachable disk on the valve-stein seating on a seat in the valve-bonnet and adjustable on said seat by means of a nut on the valve-stein.

The operation of the valve is obvious from the description.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a valve, the combination of a valvebody provided with a valve-seat, a valvebonnet provided with a diaphragm and connected with the valve-body, said valve-bonnet having an annular downwardlyextending valve-seat also having diametrically opposite channels, a valve adapted to rest on the seat in the valve-body and having arms sliding in the channels in the valve-bonnet, a channeled valve-stem carrying a disk seating on the seat in the valve-bonnet, bearing-plates iittingin the valve-bonnet above its diaphragm, balls interposed between said bearing-plates and surrounding the valve-stem, a ring inclosing` the Valve-stem and having a lug fitting in the channel thereof, and a screw-cap screwing on the valve-stem above said ring and surrounding and inelosing the upper end of the valvebonnet, as set forth.

2. A valve-stem D having a slot d, a screw d', screw-threaded parts (Z2 and d3, an integral disk-plate (l, and a retaining-nut D2, in combination with a disk fitting on said diskplate, a valve-bonnet having an internal seat on which said disk seats also having a cavity in its upper part, balls in said cavity, a ring surrounding said stem above said balls and having a lug iitting in the channel in said stem, a screw-cap serewin g on said stein above said ring, a valve-body with which said valvebonnet is connected, and a slidable valve B operated by the screw d', as set forth.

In witness whereof I have hereunto subscribed, at Springfield, Illinois, this 4th day of February, 1896.

JAMES L. COOK.

lVitnesses:

W. J. AURELIUs, WM. W. DEUTSCH.

IOO

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